Nancy Knox Roberts grave

Nancy Knox Roberts grave

My 2 great grandfather moved to Marion County about 1890. John D. Knox. His daughter, Nancy R. b.1869 in TN, married a Roberts but I don't know his name. According to her mother's probate in Garvin Cty, Oklahoma she is listed as Nancy Roberts living in Peel, Arkansas in 1906. There is a grave in Peel Cemetery listed as Nancy Knox Roberts. Knox was added after an early contact I made. Does anyone know who she married? I am 60% confident this is JD Knox's daughter but would like to know who she married and if there are any children. Also the dates don't exactly tie out as this probate was settled over several years and Nancy continues to be handled as alive even though she supposedly dies in 1906.